package ooday04;

public class StaticFinalDemo {
    public static void main(String[] args) {
        System.out.println(loo.PI);
//        loo.PI = 3.1415926;
        //1)加载Loo.class到方法区中
        //2)静态变量num一并存储到方法区中
        //3)到方法区中获取num的值并输出
        System.out.println(loo.num);
        //编译器在编译时会将常量直接替换为具体的值，效率高
        //相当于System.out.println(5);
        System.out.println(loo.COUNT);

    }
}

class loo{
    public static int num = 5;//静态变量
    public static final int COUNT = 5;//常量(静态常量)
    public static final double PI = 3.14159;
//    public static final int NUM;
}































